J/A+A/411/559 Effective temperature for 181 F-K dwarfs (Kovtyukh+, 2003)
High precision effective temperatures for 181 F-K dwarfs from line-depth ratios.
Kovtyukh V.V., Soubiran C., Belik S.I., Gorlova N.I.
<Astron. Astrophys. 411, 559 (2003)>
=2003A&A...411..559K 2003A&A...411..559K
ADC_Keywords: Stars, dwarfs ; Effective temperatures ; Planets
Keywords: stars: fundamental parameters - planetary systems
Abstract:
Line depth ratios measured on high resolution (R=42000), high S/N
echelle spectra are used for the determination of precise effective
temperatures of 181 F, G, K main Sequence stars with about solar
metallicity (-0.5<[Fe/H]<+0.5). A set of 105 relations is obtained
which rely Teff on ratios of the strengths of lines with high and low
excitation potentials, calibrated against previously published precise
(1%) temperature estimates. The application range of the calibrations
is 4000-6150K (F8V-K7V). The internal error of a single calibration is
less than 100K, while the combination of all calibrations for a
spectrum of S/N=100 reduces uncertainty to only 5-10K, and for S/N=200
or higher to better than 5K. The zero point of the temperature scale
is directly defined from reflection spectra of the Sun with an
uncertainty about 1K. The application of this method to investigation
of the planet host stars properties is discussed.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 79 182 Teff determinations for 181 MS stars
calib.dat 111 112 Calibrations Teff=f(Rlambda1/Rlambda2)
--------------------------------------------------------------------------------
See also:
J/A+AS/117/227 : Dwarf effective temperatures (Alonso+ 1996)
J/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)
J/A+AS/129/505 : Effective temperatures by Infrared Flux Method
(Blackwell+ 1998)
J/A+A/339/858 : Calibration of stellar parameters (Di Benedetto 1998)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- HD/BD HD or BD name
13- 16 I4 --- HR ? HR number
18- 28 A11 --- Name Star name
31- 34 I4 K Teff Mean effective temperature of the star
36- 38 I3 --- Ncal Number of the calibrations used
40- 43 F4.1 K e_Teff rms, standard error of the mean Teff
46- 49 I4 K Teff(EDV93) ? Teff from Edvardson et al., 1993,
Cat. J/A+A/275/101
52- 55 I4 K Teff(AAMR96) ? Teff from Alonso et al., 1996,
Cat. J/A+AS/117/227
57- 60 I4 K Teff(BLG98) ? Teff from Blackwell & Lynas-Gray, 1998,
Cat. J/A+AS/129/505
62- 65 I4 K Teff(DB98) ? Teff from Di Benedetto, 1998,
Cat. J/A+A/339/858
67- 71 F5.3 mag VMAG Absolute V magnitude
73- 77 F5.3 mag B-V (B-V) color index
79 A1 --- Rem [*] *: stars with planets
--------------------------------------------------------------------------------
Byte-by-byte Description of file: calib.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 K DeltaT1 Application range of the calibration
5 A1 --- --- [-]
6- 9 I4 K DeltaT2 Application range of the calibration
11- 13 I3 K rms Rms of the fit
15- 21 F7.2 0.1nm lambda1 Wavelength of the first line
23- 26 F4.2 eV EPL1 Low excitation potential of the first line
28- 30 A3 --- Elem1 First element
32- 38 F7.2 0.1nm lambda2 Wavelength of the second line
40- 43 F4.2 eV EPL2 Low excitation potential of the second line
45- 47 A3 --- Elem2 Second element
49-111 A63 --- F(r) Analytic expression Teff=f(r) (1)
--------------------------------------------------------------------------------
Note (1): Line-depth ratio: r =R(lambda1)/R(lambda2)
--------------------------------------------------------------------------------
Acknowledgements: C. Soubiran
V. Kovtyukh
References:
SIMBAD at http://simbad.u-strasbg.fr
(End) Patricia Bauer [CDS] 28-Nov-2003